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At a distance of just 4.2 light-years, Proxima b is the closest exoplanet to Earth - and let's be honest, what is 4.2 light-years? Well, after all, 37.8 trillion kilometres - and thus a distance that currently seems simply insurmountable for us! Because even the fastest probes of our time would take several millennia to reach the planetary system around Proxima Centauri! But does this also mean that exoplanets like Proxima b will remain out of our reach forever? Well, not necessarily: in fact, experts are already working hard to turn the dream of interstellar travel into reality! The corresponding concepts are both revolutionary and unorthodox - but how likely is it that the "jump to the stars" can be mastered in just a few decades in the future? And most importantly: how could the biggest step in space travel be taken by the smallest probe ever?